Jeffrey Kung Email & Phone Number

Cupertino, Ca, Us

Santa Clara, Ca, Us

San Jose, Ca, Us

Performed schematic capture with hierarchical design tools●Designed modular line card for network switches●Provided support for PCB layout●Oversaw prototype build●Performed hardware bring-up, debugging and qualification●Conducted initial environmental tests to validate electrical design●Generated bill of materials (BOM)●Drafted and maintained technical documentation describing hardware architectureCollaborated with various teams including SI, software, mechanical, manufacturing, and marketing●Provided root cause analysis for critical design issues●Assisted with compliance testingWorked with contract manufacturer to maximize yield●Debugged boards remotely●Visited site to improve processValidated compatibility of new components with existing hardwareProvided support to failure analysis team, resolving issues found in the fieldControlled distribution of prototypes to various teams

San Jose, Ca, Us

Signal and power noise analysis and measurement (SI/PI)●Performed eye and jitter measurements at compliance checkpoints against industry standards for high speed SerDes and PCIe Gen2 interfaces●Measured PI parameters, such as switching AC noise and DC droop●Measured differential and single ended clocks●Worked with Diagnostic engineer on front port SerDes transmitter tuning with Host Compliance Board (HCB)100G QSFP copper cable assembly characterization and connector analysis●Skew measurement with TDR (Time Domain Reflectometry)●S-parameter measurement with 16 port VNA (Vector Network Analysis)●Near end, far end crosstalk measurementAutomated SI/PI report process with Python scriptsUsed Cadence Allegro tools to view board files to identify nets of interest and probe points●Soldered sensitive high speed probes to board for optimal measurementsTrained other employees to perform SI/PI measurement tasks

Validated behavior of fan speed control algorithm●Looked at on die temperature reading of chip and compared various fan speeds●Determined optimal fan speeds for low power consumption while satisfying system thermal requirements●Characterized system acoustic signature, preventing undesired effects such as beating and fan stall●Modified fan tray for fault injection; this simulates single and multiple fan failure scenariosTested and verified DC power supply module●Provided hardware support to software team to debug interrupt storm issues●Validated power supply redundancy (N+N and N+1 models) and shutdown features of modular chassis●Set up test fixture for environmental tests (EDVT)Constructed rework procedure for contracted manufactured staff to efficiently perform clock domain rework on site●Guided rework contractors to go through 300+ boards and tested each board before re-distribution to development team

Reverse engineered a electrical smartmeter●Disassembled a commercial smartmeter, researched components used in device●Drew schematic showing how each component is connectedPerformed feasibility study on viability of smartmeters